Lazhar
New member
Its a really simple design I found online. I used 20 leds from eBay 10 royal blues and 10 cool whites. and made 4 bundles of 5 each to turn them on at diferent times. They are 3 watt each and take 700ma at 3.5 volts. So I power them from a 20 volt 3.5 amp laptop power supply. The LM317 is not very efficient onless you keep the input voltage and output close but leave the 3 volts it uses itself. The way I have it setup they only get warm, so they are working very well.I am interested in your led driver design.
Them I power them separately with relays. To get one royal blue on at 8:30, one cool white at 9:30, the rest on at 10:30 and then they turn off in the oposite sequense.